****Thank you, both are sold****
Okay, I think this is the last thing for now...
I purchased two 8" mirror kits from ASM Products last year and I just *know* I won't be making mirrors anytime soon. Rather than torture myself looking at the package every few weeks for the rest of my life, I think I'll sell it instead and think about other things ;^).
Each kit includes a BVC (Black Vitreous Ceramic) mirror blank, a plate glass tool, grits, pitch, polishing pads. BVC is known for being faster to grind than Pyrex and has exceptional thermal properties, similar to Zerodur or Astrositall. I believe there is a near-concensus now that BVC is a worthy substrate, expecially in these smaller apertures.
You may have to get a little extra 500# and 1000# grits--I borrowed a small amount to make the ground glass for a large format view camera. You can purchase grit inexpensively from GotGrit on the Internet, a convenient amateur telescope making resource.
And now for the BIG, fine print: Both of these blanks have a small chip each out of the back of them, where it doesn't matter one iota ;^). One is probably the size of a nickel and the other smaller than a dime, if memory serves correctly. One of the blanks has a small, shallow chip out of the face, perhaps 70% the size of a dime. They came from ASM that way and I never gave one thought to returning them--smallish chips like this are insignificant. I even expect the shallow face chip would all but disappear, if not completely disappear, during grinding. All in all, great blanks for that first project or for that bino-scope you've been dreaming about ;^).
I believe I paid $235 for these including shipping from Quebec to the US. How about $45 per kit plus $10 shipping in the lower states. Or $85 for both plus $15 shipping.
Thanks for looking!